<%@ page contentType="text/html;charset=UTF-8" %>
<html>
<head>
  <title>添加用户</title>
</head>
<body>
<h2>添加用户</h2>
<form action="/user/add" method="post">
  用户名: <input type="text" name="username" required><br>
  年龄: <input type="number" name="age"><br>
  邮箱: <input type="email" name="email"><br>
  <input type="submit" value="提交">
</form>
</body>
</html>